Genuine NGK 5599 Spark Plug - Laser Iridium ITR4A15

Shell

Thread Diameter: 14mm

Thread Pitch: 1.25mm

Seat Type: Tapered

Reach: 17.5mm (.689")

Hex Size: 5/8" (16mm)

Terminal Type: Solid

Overall Height: ISO

Gap: .059" (1.5mm)
Center Electrode

Material: Iridium
Type: Fine Wire
Size: 0.6mm

Projection: Projected

Ground Electrode

Material: Platinum

Type: Standard

Specifications

Resistor: Yes

Resistor Value: 5k Ohm

Heat Range: 4

Torque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 7.2-14.5 lb. ft.